Types and components of computer systems - Hardware and software, main system components, operating systems, types of computers, emerging technologies. Input, output, and storage devices - Functions and uses of input and output devices, direct data entry methods, advantages and disadvantages of storage devices. Networks and IT effects - Network devices, communication issues, IT impact on employment and workplaces, microprocessor-controlled systems, health concerns from prolonged IT use. ICT applications - Communication, data handling, measurement, microprocessors in control, modeling, industrial applications. System development and security - System life cycle stages (analysis, design, testing, implementation, documentation, evaluation), physical and online safety. Communication and audience - Internet and email communication, audience appreciation, ethical and cultural considerations in IT use.